轴箱内圈弹簧断裂原因分析  

Analysis on Fatigue Fracture Cause of Axle Box Inner Ring Spring

作　　者：逯连文[1] 刘晓琴[1] 杨健[1] 

机构地区：[1]长春轨道客车股份有限公司质量保证部理化检验室,吉林长春130062

出　　处：《工程与试验》2015年第4期35-37,共3页Engineering and Test

摘　　要：采用直读光谱仪、光学显微镜及硬度计等对断裂的轴箱内圈弹簧断口的宏观组织与性能进行检测及分析。结果表明,内圈弹簧在热卷成型前,对弹簧表面的氧化皮清除不彻底,在热卷成型时,与弹簧卷制芯轴表面相接触的弹簧表面残留的氧化皮被碾压入弹簧表层而产生了折叠缺陷。该折叠缺陷的存在,是导致轴箱内圈弹簧早期发生疲劳断裂的主要原因。Macrostructure and properties of the broken axle box inner ring spring have been tested and analyzed by using Optical Emission Spectrometer, optical microscope and hardness tester. The experimental results show that the surface oxide skin of the axle box inner ring spring hasn＇t been cleared completely before hot molding, so the residual oxide skin which contacts with spring roll surface is rolled into the spring surface layer and the folding defect is generated at coil molding. The existence of folding defects is the main cause of the fatigue fracture of the axle box inner ring spring.

关 键 词：轴箱内圈弹簧 疲劳断口 热卷成型 折叠缺陷 

分 类 号：U260.331.4[机械工程—车辆工程]